Re: Subtle MM bug

[Andi Kleen]

On Thu, Jan 11, 2001 at 12:56:04PM +0000, Stephen C. Tweedie wrote:
> Hi,
> 
> On Wed, Jan 10, 2001 at 12:11:16PM -0800, Linus Torvalds wrote:
> > 
> > That said, we can easily support the notion of CLONE_CRED if we absolutely
> > have to (and sane people just shouldn't use it), so if somebody wants to
> > work on this for 2.5.x...
> 
> But is it really worth the pain?  I'd hate to have to audit the entire
> VFS to make sure that it works if another thread changes our
> credentials in the middle of a syscall, so we either end up having to
> lock the credentials over every VFS syscall, or take a copy of the
> credentials and pass it through every VFS internal call that we make.

That is what NFS does already, it would just move into generic VFS then.
(NFS copies) 

-Andi